Klinefelter syndrome is defined as a chromosomal disorder found among males that is caused by an extra X sex chromosome and that is characterized by infertility and mild mental retardation. Moreover, Klinefelter syndrome is a genetic disorder in men in which there are three (3) sex chromosomes, XXY, instead of two (2) which is characterized by small testes, low sperm production, breast enlargement, and absence of facial and body hair.